EP3971308A4 - HIGH STRENGTH ELEMENT, METHOD OF PRODUCTION OF HIGH STRENGTH ELEMENT AND METHOD OF PRODUCTION OF STEEL SHEET FOR HIGH STRENGTH ELEMENT - Google Patents

HIGH STRENGTH ELEMENT, METHOD OF PRODUCTION OF HIGH STRENGTH ELEMENT AND METHOD OF PRODUCTION OF STEEL SHEET FOR HIGH STRENGTH ELEMENT Download PDF

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Publication number
EP3971308A4
EP3971308A4 EP20805261.3A EP20805261A EP3971308A4 EP 3971308 A4 EP3971308 A4 EP 3971308A4 EP 20805261 A EP20805261 A EP 20805261A EP 3971308 A4 EP3971308 A4 EP 3971308A4
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EP
European Patent Office
Prior art keywords
high strength
strength element
production
steel sheet
steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20805261.3A
Other languages
German (de)
French (fr)
Other versions
EP3971308B1 (en
EP3971308A1 (en
Inventor
Takuya Hirashima
Shinjiro Kaneko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
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JFE Steel Corp
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/22—Martempering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/02—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
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    • C21D8/0294—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a localised treatment
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    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0426—Hot rolling
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    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0436—Cold rolling
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    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
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    • C21D8/0494—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing involving a localised treatment
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    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Articles (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP20805261.3A 2019-05-16 2020-05-12 High strength member, method for manufacturing high strength member, and method for manufacturing steel sheet for high strength member Active EP3971308B1 (en)

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JP2019092656 2019-05-16
JP2019121144 2019-06-28
PCT/JP2020/019021 WO2020230796A1 (en) 2019-05-16 2020-05-12 High-strength member, method for manufacturing high-strength member, and method for manufacturing steel sheet for high-strength member

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US (1) US12454733B2 (en)
EP (1) EP3971308B1 (en)
JP (3) JP6950835B2 (en)
KR (1) KR102654714B1 (en)
CN (1) CN113840934B (en)
MX (1) MX2021013945A (en)
WO (1) WO2020230796A1 (en)

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KR20230098835A (en) * 2020-12-03 2023-07-04 제이에프이 스틸 가부시키가이샤 Delayed fracture characteristic evaluation method, and program
US20240229180A9 (en) * 2021-03-02 2024-07-11 Jfe Steel Corporation Steel sheet, member, and methods for manufacturing the same
WO2022185805A1 (en) * 2021-03-02 2022-09-09 Ｊｆｅスチール株式会社 Steel sheet, member, method for producing said steel sheet, and method for producing said member
JP7111281B1 (en) * 2021-03-02 2022-08-02 Ｊｆｅスチール株式会社 Steel plate, member and manufacturing method thereof
WO2022185804A1 (en) * 2021-03-02 2022-09-09 Ｊｆｅスチール株式会社 Steel sheet, member, method for producing said steel sheet, and method for producing said member
KR20230089785A (en) * 2021-12-14 2023-06-21 주식회사 포스코 Ultra high strength steel sheet having excellent bendability, and method for manufacturing thereof
KR20240052137A (en) * 2022-10-13 2024-04-23 주식회사 포스코 Ultra high strength steel sheet having excellent bendibility and method for manufacturing the same
JPWO2025070760A1 (en) * 2023-09-28 2025-04-03
KR20250093734A (en) * 2023-12-15 2025-06-25 주식회사 포스코 Cold rolled steel sheet and manufacturing method thereof
JP2025112825A (en) * 2024-01-22 2025-08-01 トヨタ自動車株式会社 Impact absorbing component manufacturing method and impact absorbing component
CN118086782B (en) * 2024-04-28 2024-07-16 江苏永钢集团有限公司 High-plasticity hot-rolled wire rod for 8.8-grade non-adjustable bolt and manufacturing method thereof
CN119040765B (en) * 2024-09-02 2025-10-24 河北鑫途紧固件制造有限公司 Corrosion-resistant anchor bolts

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EP3276022A1 (en) * 2015-03-25 2018-01-31 JFE Steel Corporation Cold-rolled steel sheet and manufacturing method therefor
EP3467135A1 (en) * 2016-08-10 2019-04-10 JFE Steel Corporation Thin steel sheet, and production method therefor

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DE102010011368B4 (en) 2010-03-12 2014-03-20 Benteler Automobiltechnik Gmbh Process for the production of press-hardened molded components
JP6018745B2 (en) 2011-01-14 2016-11-02 株式会社アマダホールディングス Method for bending plate material and residual stress increase / decrease device
EP2738280B1 (en) 2011-07-29 2019-03-20 Nippon Steel & Sumitomo Metal Corporation High-strength galvanized steel sheet having superior bendability and method for producing same
JP6424841B2 (en) * 2016-01-13 2018-11-21 Ｊｆｅスチール株式会社 Method of manufacturing molded member
WO2017138504A1 (en) 2016-02-10 2017-08-17 Ｊｆｅスチール株式会社 High-strength steel sheet and method for manufacturing same
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EP3276022A1 (en) * 2015-03-25 2018-01-31 JFE Steel Corporation Cold-rolled steel sheet and manufacturing method therefor
JP6050912B1 (en) * 2016-06-24 2016-12-21 東洋スチール株式会社 How to prevent cracks in drawn products of high-strength steel sheets
EP3467135A1 (en) * 2016-08-10 2019-04-10 JFE Steel Corporation Thin steel sheet, and production method therefor

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KR20210149841A (en) 2021-12-09
JP7736476B2 (en) 2025-09-09
WO2020230796A1 (en) 2020-11-19
EP3971308B1 (en) 2024-08-07
JP2021181625A (en) 2021-11-25
JP6950835B2 (en) 2021-10-13
JPWO2020230796A1 (en) 2021-05-20
KR102654714B1 (en) 2024-04-04
MX2021013945A (en) 2022-01-04
JP2024164841A (en) 2024-11-27
US20220220577A1 (en) 2022-07-14
CN113840934A (en) 2021-12-24
EP3971308A1 (en) 2022-03-23
US12454733B2 (en) 2025-10-28
CN113840934B (en) 2022-10-28

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